1 files changed, 15 insertions, 0 deletions
diff --git a/tests/untried/neg/t3854.scala b/tests/untried/neg/t3854.scala
new file mode 100644
index 000000000..e8db76c0a
--- /dev/null
+++ b/tests/untried/neg/t3854.scala
@@ -0,0 +1,15 @@
+class Bar[F[_]] extends Foo[F] {
+  def foo[G[_[_], _]](implicit M: M[G]): X[({type λ[α] = G[F, α] })#λ] = null
+}
+// vim: set ts=4 sw=4 et:
+
+trait M[F[_[_], _]]
+trait N[F[_], G[_]]
+
+trait X[F[_]] {
+  def apply[A]: F[A]
+}
+
+trait Foo[F[_]] {
+  def foo[G[_]](implicit n: N[G, F]): X[F]
+}